Listen for text changes on EditText

Assume you want to enable a button only if some changes have been made to a form. You can do this by using android.text.TextWatcher
Simply create a new instance of TextWatcher and implement the required methods
There you have it. For more info checkout http://developer.android.com/reference/android/text/TextWatcher.html

	import android.text.TextWatcher;
	private void addEditTextChangeListeners() {
	TextWatcher textListener = new TextWatcher() {
	public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) {}
	public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) {}
	public void afterTextChanged(Editable editable) {
	saveButton.setEnabled(editable.length() > 0);
	}
	};
	url.addTextChangedListener(textListener);
	}

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